Nitrogen is one of the most important factor affecting maize (Zea mays L.) yield and income of smallholders under semiarid climates. Field experiments were conducted to investigate the impact of different N-fertilizer sources [urea, calcium ammonium nitrate (CAN), and ammonium sulfate (AS)] and rates (50, 100, 150, and 200 kg ha-1) on umber of rows ear-1 (NOR ear-1), number of seeds row-1 (NOS ...

The effect of sewage sludge fertilization on nitrogen and sulphur content in maize was assessed in a pot experiment conducted in 2003-2005. The experimental design comprised the following treatments in four replications on three soils: treatment without fertilizer – (0); mineral fertilization – (NPK); farmyard manure – (FYM); sewage sludge A – (SSA); a mixture of sewage sludge A with peat – (MS...

Plus-hybrid effect refers to a combined effect of cytoplasmic male sterility (CMS) and xenia in maize (Zea mays L.) It could be used in commercial production by growing a mixture of 80% CMS hybrid and 20% of another fertile hybrid. The aim of this research was to examine individual and combined CMS and xenia effects on two hybrids widely grown in Serbia. Sterile and fertile versions of ZP 1 and...

a breeding program was started in safiabad agricultural research center in 1999, to produce an improved maize hybrid with a relative heat stress tolerance. consequently at 2005 a few s6 lines with having moderately tolerance to high temperature were obtained. these combinates were then evaluated for three consecutive years in three sub-tropical regions of the country includes khzestan, ilam and...

Cassava-maize-bean intercropping systems testing effects of spacing (plant density) and bean planting date were assessed under two major Burundi agro-ecological zones (AEZ), Mumirwa Kirimiro. Evaluated for all three tested crops as follows: recommended spacing(RS), RS+20 % RS + 40 %. Bean was planted either at the same time other or with a 3-week delay.Measured parameters intercrops’and total y...

Continuous exposure to an aversive mixture was investigated as a means of maintaining aversion to vermeerbos in sheep subjected to the social influence of non-averted sheep. The use of an aversive mixture was based on a hypothesis that continuous exposure to an acceptable aversive mixture (containing both the aversive substance and the identification factors of vermeerbos mixed with maize meal)...

Continuous cultivation of rice–wheat cropping system (RWCS) in Indo-Gangetic Plains India is showing declining factor productivity coupled with many environmental problems. Diversifying the RWCS one friendly options for sustaining food production. Four crop rotations involving maize and sorghum summer, wheat/potato/mustard winter followed by short duration mung bean late spring were studied to ...

Decomposition influences carbon and nutrient cycling from crop residues. The nylon-mesh-bag technique was implied to study the decomposition N-release dynamics different residues under field conditions. four types of were: maize (lower than 50% below cob), wheat 25% stubbles), a whole mung bean residue, mixture + residue (1:1 ratio) put on soil surface in sub-surface. N release both at-surface-...